"Due to the recurrence of sciatica, tomorrow morning's celebration at the Altar of the Chair of the Vatican Basilica will not be presided over by the Holy Father, but by His Excellency Mons.
Rino Fisichella. The meeting with the Diplomatic Corps on Monday 25 January is postponed, while Vespers for the conclusion of the week of prayer for Christian unity in the Basilica of St. Paul will be presided over by His Eminence Cardinal Kurt Koch. Pope Francis will still lead the Angelus prayer in the Library of the Apostolic Palace tomorrow at 12:00, as expected ".
Thus the Vatican spokesman Matteo Bruni.